How to force svn to overwrite the main branch? the main branch is not needed.

how to force svn to overwrite the main branch, the main branch does not want

Svn
Dec.01,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e5b31e-45609.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e5b31e-45609.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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